Display panel

Abstract

The present application provides a display panel, which includes an array substrate, an opposing substrate, a cholesteric liquid crystal layer and a light-shielding layer. The cholesteric liquid crystal layer includes a plurality of first liquid crystal units and a second liquid crystal unit. The liquid crystal molecules in the first liquid crystal unit and the second liquid crystal unit have different helical pitches. By arranging the light-shielding layer on the side of the cholesteric liquid crystal layer away from the array substrate, the light-shielding layer is used to shield the boundary between adjacent first liquid crystal units and second liquid crystal units, thereby preventing ultraviolet light from irradiating the boundary between adjacent first liquid crystal units and second liquid crystal units, causing the liquid crystal molecules in this area to form a helical pitch that does not match the light of the wavelength band originally intended to be reflected, thereby avoiding the occurrence of color mixing between adjacent sub-pixels in the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel. Background Art

[0002] Color cholesteric liquid crystal display technology is currently a relatively new display technology. Cholesteric liquid crystal display panels use a reflective display mode. Its technical principle is mainly due to the unique selective reflection characteristics of cholesteric liquid crystal materials. It can reflect light in the band corresponding to the pitch of the liquid crystal molecules, while allowing light in other bands to pass through. By selecting the appropriate pitch, it can reflect red, green, and blue wavelengths of light. These three lights are used as the three primary colors of additive mixing to achieve full-color display.

[0003] Currently, when UV light is irradiated on a cholesteric liquid crystal display panel to achieve a specific helical pitch, different regions of the liquid crystal cells are exposed to light. This allows the liquid crystal molecules in these regions to have different helical pitches, thereby reflecting light of different colors. However, when UV light is irradiated on a liquid crystal cell in one region, the UV light can reach the liquid crystal cells in an adjacent region, causing the liquid crystal molecules in the adjacent region to develop a helical pitch that does not match the wavelength band of light they were originally intended to reflect, resulting in color mixing between adjacent liquid crystal cells.

[0004] Therefore, it is necessary to provide a display panel to improve this defect. Summary of the Invention

[0005] An embodiment of the present application provides a display panel that can avoid the phenomenon of color mixing between adjacent sub-pixels in the display panel.

[0006] An embodiment of the present application provides a display panel, including:

[0007] an array substrate;

[0008] an opposing substrate, arranged opposite to the array substrate;

[0009] a cholesteric liquid crystal layer disposed between the array substrate and the counter substrate, the cholesteric liquid crystal layer comprising a plurality of first liquid crystal units and a plurality of second liquid crystal units, wherein the helical pitch of the liquid crystal molecules in at least some adjacent liquid crystal units is different from the helical pitch of the liquid crystal molecules in the second liquid crystal units;

[0010] In which, the display panel also includes a shading layer, which is arranged on the side of the cholesteric liquid crystal layer away from the array substrate, and the shading layer includes a plurality of shading parts, and the orthographic projections of the shading parts on the cholesteric liquid crystal layer cover the boundary between the adjacent first liquid crystal unit and the second liquid crystal unit.

[0011] According to an embodiment of the present application, the light shielding layer includes a plurality of light-transmitting holes, and the orthographic projections of the light-transmitting holes on the cholesteric liquid crystal layer partially cover the corresponding first liquid crystal unit or the second liquid crystal unit.

[0012] According to an embodiment of the present application, the display panel further includes a photoinitiator inhibition layer, and the photoinitiator inhibition layer is disposed between adjacent first liquid crystal units and second liquid crystal units.

[0013] According to an embodiment of the present application, the display panel further includes a spacer layer, the spacer layer is disposed between the array substrate and the counter substrate, the spacer layer includes a plurality of spacers, and the spacers are disposed between adjacent first liquid crystal cells and second liquid crystal cells;

[0014] The photoinitiation inhibition layer is disposed on the outer surface of the spacer.

[0015] According to an embodiment of the present application, the display panel further includes a spacer layer, the spacer layer is disposed between the array substrate and the counter substrate, the spacer layer includes a plurality of spacers, and the spacers are disposed between adjacent first liquid crystal cells and second liquid crystal cells;

[0016] The photoinitiation inhibition layer is disposed between one end of the spacer close to the counter substrate and the counter substrate.

[0017] According to an embodiment of the present application, the material of the photoinitiation inhibition layer includes a photoinitiation inhibitor.

[0018] According to an embodiment of the present application, the display panel further includes an infrared filter layer, and the infrared filter layer is disposed on a side of the counter substrate away from the cholesteric liquid crystal layer.

[0019] According to an embodiment of the present application, the material of the infrared filter layer includes aluminum zinc oxide.

[0020] According to an embodiment of the present application, the counter substrate includes a base substrate and a common electrode layer. The common electrode layer is disposed on a side of the base substrate close to the cholesteric liquid crystal layer. The material of the common electrode layer includes aluminum zinc oxide.

[0021] According to one embodiment of the present application, the first liquid crystal unit is used to reflect one of red light, green light and blue light when an electric field is applied, and the second liquid crystal unit is used to reflect the other of red light, green light and blue light when an electric field is applied.

[0022] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel, which includes an array substrate, an opposing substrate, a cholesteric liquid crystal layer and a shading layer. The cholesteric liquid crystal layer includes a plurality of first liquid crystal units and a second liquid crystal unit. The pitches of the liquid crystal molecules in the first liquid crystal unit and the second liquid crystal unit are different. By arranging the shading layer on the side of the cholesteric liquid crystal layer away from the array substrate, the shading layer is used to block the boundary between the adjacent first liquid crystal unit and the second liquid crystal unit, thereby preventing ultraviolet light from irradiating the boundary between the adjacent first liquid crystal unit and the second liquid crystal unit, causing the liquid crystal molecules in the area to form a pitch that does not match the wavelength of light they originally want to reflect, thereby avoiding the occurrence of adjacent sub-pixels mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a first display panel provided in an embodiment of the present application;

[0024] Figure 2 Schematic diagram of the UV exposure process of the display panel;

[0025] Figure 3 A schematic structural diagram of a second display panel provided in an embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of a third display panel provided in an embodiment of the present application;

[0027] Figure 5 A schematic structural diagram of a fourth display panel provided in an embodiment of the present application;

[0028] Figure 6 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following descriptions of the embodiments refer to the accompanying figures to illustrate specific embodiments that may be implemented in this application. Directional terms used in this application, such as [upper], [lower], [front], [back], [left], [right], [inner], [outer], and [side], refer only to the directions in the accompanying figures. Therefore, the directional terms used are intended to illustrate and facilitate understanding of this application and are not intended to limit this application. In the figures, similarly structured elements are denoted by the same reference numerals.

[0030] The present application will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] An embodiment of the present application provides a display panel that can avoid the phenomenon of color mixing between adjacent sub-pixels in the display panel.

[0032] Combine Figure 1 As shown, Figure 1 A structural schematic diagram of the first display panel provided in an embodiment of the present application is provided, wherein the display panel includes an array substrate 1, an opposing substrate 2 and a cholesteric liquid crystal layer 3, wherein the opposing substrate 2 is arranged opposite to the array substrate 1, and the cholesteric liquid crystal layer 3 is arranged between the array substrate 1 and the opposing substrate 2.

[0033] In an embodiment of the present application, the raw materials for preparing the cholesteric liquid crystal layer 3 include nematic liquid crystal, a chiral dopant, and an ultraviolet light initiator. The ultraviolet light initiator generates active groups under ultraviolet light irradiation. The chiral groups in the chiral dopant can induce the nematic liquid crystal molecules to form a helical arrangement with a specific helical pitch (i.e., pitch). The helical arrangement of the cholesteric liquid crystal enables it to selectively reflect light in the wavelength band corresponding to the pitch of the liquid crystal molecules, while allowing light in other wavelength bands to pass through. The liquid crystal molecules in different regions of the cholesteric liquid crystal layer 3 are exposed to ultraviolet light in different areas, so that the liquid crystal molecules in different regions have different pitches, thereby causing the liquid crystal molecules in different regions to reflect light of different colors.

[0034] In the embodiment of the present application, the cholesteric liquid crystal layer 3 includes a plurality of first liquid crystal cells 31 and a second liquid crystal cell 32, each of which is equivalent to a sub-pixel. The first liquid crystal cells 31 and the second liquid crystal cells 32 contain a plurality of liquid crystal molecules, and the liquid crystal molecules in the first liquid crystal cells 31 and the second liquid crystal cells 32 have a specific helical pitch. The helical pitches of the liquid crystal molecules in the first liquid crystal cells 31 and the second liquid crystal cells 32 are different, so that adjacent first liquid crystal cells 31 and second liquid crystal cells 32 can reflect light of different colors.

[0035] In some embodiments, the first liquid crystal cell 31 is configured to reflect one of red light, green light, and blue light when an electric field is applied, and the second liquid crystal cell 32 is configured to reflect the other of red light, green light, and blue light when an electric field is applied.

[0036] In one embodiment, the cholesteric liquid crystal layer 3 includes a plurality of first liquid crystal cells 31, a plurality of second liquid crystal cells 32, and a plurality of third liquid crystal cells 33. The first liquid crystal cells 31, the second liquid crystal cells 32, and the third liquid crystal cells 33 can be arranged according to the arrangement of liquid crystal cells in existing display panels. The first liquid crystal cells 31, the second liquid crystal cells 32, and the third liquid crystal cells 33 have different helical pitches. For example, the liquid crystal molecules in the first liquid crystal cells 31 have a first helical pitch that causes the first liquid crystal cells 31 to reflect red light, the liquid crystal molecules in the second liquid crystal cells 32 have a second helical pitch that causes the second liquid crystal cells 32 to reflect green light, and the liquid crystal molecules in the third liquid crystal cells 33 have a third helical pitch that causes the third liquid crystal cells 33 to reflect blue light.

[0037] In some embodiments, the display panel further includes a light shielding layer 4 , which is disposed on a side of the cholesteric liquid crystal layer 3 away from the array substrate 1 , and an orthographic projection of the light shielding layer 4 on the cholesteric liquid crystal layer 3 covers the boundary between adjacent liquid crystal units.

[0038] In one embodiment, Figure 1 As shown, the orthographic projection of the light-shielding layer 4 on the cholesteric liquid crystal layer 3 not only covers the boundary between the first liquid crystal cell 31 and the second liquid crystal cell 32, that is, the light-shielding layer 4 covers the portion of the first liquid crystal cell 31 close to the second liquid crystal cell 32, but also covers the portion of the second liquid crystal cell 32 close to the first liquid crystal cell 31. In addition, the light-shielding layer 4 also covers the boundary between the second liquid crystal cell 32 and the third liquid crystal cell 33, that is, the light-shielding layer 4 covers the portion of the second liquid crystal cell 32 close to the third liquid crystal cell 33, and also covers the portion of the third liquid crystal cell 33 close to the second liquid crystal cell 32.

[0039] Combine Figure 2 As shown, Figure 2 This is a schematic diagram of the UV exposure process for a display panel. Taking the first liquid crystal cell 31 as an example, the exposure process for the cholesteric liquid crystal layer is as follows: A mask 10 is placed on the side of the opposing substrate 2 facing away from the array substrate 1. The mask 10 has a light-transmitting region 11 and a light-impermeable region 12. The light-transmitting region 11 faces the first liquid crystal cell 31, while the light-impermeable region 12 faces the rest of the display panel. Ultraviolet light passes through the light-transmitting region 11 and irradiates the first liquid crystal cell 31, causing the liquid crystal molecules in the first liquid crystal cell 31 to form a first helical pitch that reflects red light. The light-shielding layer 4 blocks the UV light from reaching the second liquid crystal cell 32, preventing the liquid crystal molecules in the second liquid crystal cell 32 from forming the first helical pitch that reflects red light, thereby preventing color mixing between the first and second liquid crystal cells 31, 32. Similarly, when the second or third liquid crystal cell 32, 33, is exposed to UV light, the light-shielding layer 4 also prevents UV light from reaching other liquid crystal cells adjacent to the second or third liquid crystal cell 32, 33, thereby preventing color mixing between adjacent liquid crystal cells.

[0040] In some embodiments, the light-shielding layer 4 includes a plurality of light-shielding portions 41 and a plurality of light-transmitting holes 42, wherein the orthographic projections of the light-shielding portions 41 on the cholesteric liquid crystal layer 3 cover the boundary portions of adjacent liquid crystal units, and the orthographic projections of the light-transmitting holes 42 on the cholesteric liquid crystal layer 3 partially cover the corresponding liquid crystal units.

[0041] like Figure 1As shown, the light-shielding layer 4 includes a plurality of light-shielding portions 41 and a plurality of light-transmitting holes 42. The plurality of light-shielding portions 41 are spaced apart from each other, and the light-transmitting holes 42 are disposed between adjacent light-shielding portions 41. The light-transmitting holes 42 extend through the light-shielding layer 4 in the thickness direction of the display panel. Taking the first liquid crystal cell 31 as an example, the orthographic projections of the light-shielding portions 41 on the cholesteric liquid crystal layer 3 cover the edge portions of the first liquid crystal cell 31, while the orthographic projections of the light-transmitting holes 42 on the cholesteric liquid crystal layer 3 cover the middle portion of the first liquid crystal cell 31. That is, the size of the light-transmitting holes 42 is smaller than that of the first liquid crystal cell 31. This allows ultraviolet light to pass through the light-transmitting holes 42 and irradiate the first liquid crystal cell 31, thereby adjusting the pitch of the liquid crystal molecules in the first liquid crystal cell 31 and preventing color mixing between adjacent liquid crystal cells. It also allows visible light to pass through the light-transmitting holes 42 and irradiate the first liquid crystal cell, allowing red light reflected from the first liquid crystal cell 31 to be emitted from the display panel through the light-transmitting holes 42. Similarly, the corresponding relationship between the light shielding portion 41 and the light transmission hole 42 and the second liquid crystal unit 32 and the third liquid crystal unit 33 is the same, which will not be described here.

[0042] In one embodiment, a plurality of light shielding portions 41 are interconnected to form a grid structure, and the hollow areas in the grid structure are light-transmitting holes 42 .

[0043] In one embodiment, the light shielding layer 4 is made of an opaque material, which can be selected from resin, carbon black, and metal. Taking resin as an example, the light shielding layer 4 can be made of black resin, commonly known as a black matrix.

[0044] In one embodiment, Figure 1 As shown, the counter substrate 2 includes a base substrate 21 and a common electrode layer 22 . The common electrode layer 22 is disposed on a side of the base substrate 21 close to the cholesteric liquid crystal layer 3 . The light shielding layer 4 is disposed between the base substrate 21 and the common electrode layer 22 .

[0045] In some other embodiments, the position of the shading layer 4 is not limited to the above-mentioned embodiment. The shading layer 4 can also be set on the side of the base substrate 21 away from the common electrode 22. It is only necessary to ensure that the positive projection of the shading layer 4 on the cholesteric liquid crystal layer 3 can cover the boundary between the adjacent first liquid crystal unit 31 and the second liquid crystal unit 32 and the boundary between the third liquid crystal unit 33 and the first liquid crystal unit 31 or the second liquid crystal unit 32, so as to prevent the adjacent liquid crystal units from mixing colors.

[0046] In one embodiment, Figure 1 As shown, the display panel further includes a pixel electrode 6 , which is disposed on a side of the array substrate 1 close to the cholesteric liquid crystal layer 3 . The common electrode layer 22 and the pixel electrode 6 are both made of indium tin oxide (ITO).

[0047] In some embodiments, the material of the common electrode layer 22 includes aluminum zinc oxide.

[0048] It should be noted that the current cholesteric reflective display panel has a low stability in reflected color. When the cholesteric reflective display panel is exposed to natural light (especially in the infrared band) for a long time, the pitch of the liquid crystal molecules in the cholesteric liquid crystal layer is prone to irreversible changes, resulting in changes in the reflected color of the cholesteric liquid crystal layer, causing the display panel to have color deviation or discoloration problems.

[0049] Since aluminum zinc oxide has a high transmittance to visible light and a high reflectivity to infrared light, this embodiment sets the material of the common electrode layer 22 to aluminum zinc oxide, and uses the common electrode layer 22 to reflect part of the infrared light, thereby reducing the infrared light irradiated to the cholesteric liquid crystal layer 3. This avoids the irreversible change of the pitch of the liquid crystal molecules under long-term exposure to natural light, which may cause the display panel to produce color deviation and other display defects, thereby improving the stability of the reflected color of the display panel.

[0050] In one embodiment, the material of the common electrode layer 22 is aluminum zinc oxide, and the material of the pixel electrode 6 is indium tin oxide.

[0051] In one embodiment, the materials of the common electrode layer 22 and the pixel electrode 6 are both aluminum zinc oxide.

[0052] In some embodiments, the display panel further includes an infrared filter layer 5 , which is disposed on a side of the counter substrate 2 away from the cholesteric liquid crystal layer 3 .

[0053] In one embodiment, Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a second display panel provided in an embodiment of the present application. The display panel also includes an infrared filter layer 5, which is disposed on the surface of the base substrate 21 away from the common electrode 22. The infrared filter layer 5 is configured to transmit visible light and reflect infrared light. By adding the infrared filter layer 5 on the side of the counter substrate 2 away from the cholesteric liquid crystal layer 3, this embodiment reduces the amount of infrared light reaching the cholesteric liquid crystal layer 3. This prevents the display panel from experiencing color shift and other display defects due to irreversible changes in the pitch of the liquid crystal molecules under prolonged exposure to natural light, thereby improving the stability of the display panel's reflected color.

[0054] In one embodiment, the material of the infrared filter layer 5 includes aluminum zinc oxide. Compared with indium tin oxide, aluminum zinc oxide has a higher transmittance to visible light and a higher reflectivity to infrared light, which can further reduce the risk of color deviation or discoloration of the display panel due to long-term exposure to natural light.

[0055] In one embodiment, the material of the infrared filter layer 5 is aluminum zinc oxide, and the materials of the common electrode layer 22 and the pixel electrode 6 are both indium tin oxide. Only the infrared filter layer 5 is used to filter the infrared light. In this way, the risk of color deviation or discoloration of the display panel due to long-term exposure to natural light can also be reduced.

[0056] In one embodiment, the materials of the infrared filter layer 5 and the common electrode layer 22 are both aluminum zinc oxide, and the material of the pixel electrode 6 is indium tin oxide. By filtering the infrared light using the infrared filter layer 5 and the common electrode layer 22, the infrared light irradiated to the cholesteric liquid crystal layer 3 can be further reduced, thereby further reducing the risk of color deviation or discoloration of the display panel due to long-term exposure to natural light.

[0057] In one embodiment, the materials of the infrared filter layer 5 , the common electrode layer 22 and the pixel electrode 6 are all aluminum zinc oxide, which can further reduce the risk of color shift or discoloration of the display panel due to long-term exposure to natural light.

[0058] In some embodiments, as Figure 4 As shown, Figure 4 A schematic structural diagram of a third display panel provided in an embodiment of the present application is shown. Figure 4 The display panel shown is Figure 1 The structure of the display panel shown is roughly the same, with the difference that the display panel also includes a photoinduced inhibition layer 7, which is arranged between the adjacent first liquid crystal unit 31 and the second liquid crystal unit 32, and the photoinduced inhibition layer 7 is also arranged between the adjacent third liquid crystal unit 33 and the first liquid crystal unit 31 or the second liquid crystal unit 32.

[0059] It should be noted that, since the cholesteric liquid crystal layer 3 contains an ultraviolet light initiator, the ultraviolet light initiator splits into free radicals after absorbing the radiation energy of ultraviolet light, which can trigger the polymerization, cross-linking and grafting reactions of the prepolymer, inducing liquid crystal arrangement in a very short time. When ultraviolet light is irradiated to the junction of the adjacent first liquid crystal unit 31 and the second liquid crystal unit 32, the liquid crystal molecules at the junction can form a pitch that does not match the color of the light they originally want to reflect, resulting in color mixing between adjacent sub-pixels.

[0060] This embodiment provides a photoinitiator-inhibiting layer 7 between adjacent first and second liquid crystal cells 31, 32. When exposed to ultraviolet light, the photoinitiator-inhibiting layer 7 reacts with the adjacent ultraviolet initiator to produce a photoinitiator-inhibiting complex. This inhibits the generation of free radicals by the ultraviolet initiator, reduces free radical reactions at the interface between the adjacent first and second liquid crystal cells 31, 32, and slows the chain reaction of free radical reactions. This prevents the helical pitch of the liquid crystal molecules at the interface between the adjacent first and second liquid crystal cells 31, 32 from changing when exposed to ultraviolet light, further reducing the risk of color mixing between adjacent sub-pixels. Similarly, the photoinitiator-inhibiting layer 7 also prevents the helical pitch of the liquid crystal molecules at the interface between the adjacent third liquid crystal cell 33 and the first or second liquid crystal cell 31, 32 from changing when exposed to ultraviolet light.

[0061] In some embodiments, the material of the photoinitiator inhibition layer 7 includes a photoinitiator inhibitor, which may specifically be Omnirad 510 .

[0062] In some embodiments, the display panel also includes a spacer layer 8, which is arranged between the array substrate 1 and the opposing substrate 2. The spacer layer 8 includes a plurality of spacers 81, and the spacers 81 are arranged between adjacent first liquid crystal units 31 and second liquid crystal units 32. The spacers 81 are also arranged between adjacent third liquid crystal units 33 and the first liquid crystal unit 31 or the second liquid crystal unit 32. The photoinduced inhibition layer 7 is arranged on the outer surface of the spacer 81.

[0063] like Figure 4 As shown, the display panel further includes a spacer layer 8, which is disposed between the array substrate 1 and the counter substrate 2. The spacer layer 8 includes a plurality of spacers 81, with adjacent spacers 81 enclosing each other to form a groove. The first liquid crystal cell 31, the second liquid crystal cell 32, and the third liquid crystal cell 33 are respectively disposed within the corresponding grooves and, after overflowing the grooves, meet above the spacers 81. A photoinitiator inhibition layer 7, in the form of a thin film, covers the outer surface of the spacer 81. The outer surface of the spacer 81 includes the top surface of the spacer 81 on the side closest to the counter substrate 2 and the peripheral side surface of the spacer 81. The photoinitiator inhibition layer 7 completely separates the spacer 81 from the first liquid crystal cell 31, the second liquid crystal cell 32, and the third liquid crystal cell 33.

[0064] exist Figure 4 In the embodiment shown, the display panel may also include Figure 3 The infrared filter layer (not shown) in the illustrated embodiment is disposed on a side of the counter substrate 2 away from the cholesteric liquid crystal layer 3 , and specifically can be disposed on a surface of the base substrate 21 away from the common electrode 22 .

[0065] In some embodiments, the photoinitiator inhibition layer 7 is disposed between the end of the spacer 81 close to the counter substrate 2 and the counter substrate 2 .

[0066] In one embodiment, Figure 5 As shown, Figure 5 A schematic structural diagram of a fourth display panel provided in an embodiment of the present application is shown. Figure 5 The structure of the display panel shown is similar to Figure 4 The structures of the display panels shown are substantially the same, except that the photoinitiator suppression layer 7 is disposed only between the end of the spacer 81 proximate to the counter substrate 2 and the counter substrate 2. The end of the photoinitiator suppression layer 7 proximate to the counter substrate 2 abuts the counter substrate 2, and the end of the spacer 81 proximate to the array substrate 1 abuts the array substrate 1. The photoinitiator suppression layer 7, the spacer 81, the array substrate 1, and the counter substrate 2 enclose a plurality of enclosed accommodating cavities. The first liquid crystal cell 31, the second liquid crystal cell 32, and the third liquid crystal cell 33 are respectively disposed in corresponding accommodating cavities. The first liquid crystal cell 31, the second liquid crystal cell 32, and the third liquid crystal cell 33 are completely separated by the spacer 81 and the photoinitiator suppression layer 7. This prevents the liquid crystal molecules in adjacent liquid crystal cells from mixing. The photoinitiator suppression layer 7 inhibits the generation of free radicals by the ultraviolet initiator, reduces the free radical reaction at the interface of adjacent liquid crystal cells, and slows down the chain reaction of the free radical reaction. This prevents the liquid crystal molecules at the interface of adjacent liquid crystal cells from changing in pitch when irradiated by ultraviolet light, thereby further reducing the risk of color mixing between adjacent sub-pixels.

[0067] exist Figure 5 In the embodiment shown, the display panel may also include Figure 3 The infrared filter layer (not shown) in the illustrated embodiment is disposed on a side of the counter substrate 2 away from the cholesteric liquid crystal layer 3 , and specifically can be disposed on a surface of the base substrate 21 away from the common electrode 22 .

[0068] The embodiment of the present application further provides a display device, such as Figure 6 As shown, Figure 6 This is a structural schematic diagram of a display device provided in an embodiment of the present application. The display device includes a display panel 100 and a housing 200. The display panel 100 is arranged on the housing 200. The display panel 100 is the display panel provided in any of the above embodiments.

[0069] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel, which includes an array substrate, an opposing substrate, a cholesteric liquid crystal layer and a shading layer. The cholesteric liquid crystal layer includes a plurality of first liquid crystal units and a second liquid crystal unit. The pitches of the liquid crystal molecules in the first liquid crystal unit and the second liquid crystal unit are different. By arranging the shading layer on the side of the cholesteric liquid crystal layer away from the array substrate, the shading layer is used to block the junction between the adjacent first liquid crystal units and the second liquid crystal units, thereby preventing ultraviolet light from irradiating the junction between the adjacent first liquid crystal units and the second liquid crystal units, causing the liquid crystal molecules in the area to form a pitch that does not match the light of the wavelength band they originally want to reflect, thereby avoiding the phenomenon of adjacent sub-pixels in the display panel from mixing colors.

[0070] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display panel, characterized in that: include: array substrate; an opposing substrate, arranged opposite to the array substrate; a cholesteric liquid crystal layer disposed between the array substrate and the counter substrate, the cholesteric liquid crystal layer comprising a plurality of first liquid crystal units and a plurality of second liquid crystal units, wherein the helical pitch of the liquid crystal molecules in the first liquid crystal units is different from the helical pitch of the liquid crystal molecules in the second liquid crystal units; In which, the display panel also includes a light-shielding layer and a photo-initiating inhibition layer. The light-shielding layer is arranged on the side of the cholesteric liquid crystal layer away from the array substrate. The light-shielding layer includes multiple light-shielding parts. The orthographic projection of the light-shielding part on the cholesteric liquid crystal layer covers the junction part between the adjacent first liquid crystal unit and the second liquid crystal unit. The photo-initiating inhibition layer is arranged between the adjacent first liquid crystal unit and the second liquid crystal unit. The material of the photo-initiating inhibition layer includes a photo-initiating inhibitor.

2. The display panel according to claim 1, wherein The light shielding layer includes a plurality of light-transmitting holes, and the orthographic projections of the light-transmitting holes on the cholesteric liquid crystal layer partially cover the corresponding first liquid crystal unit or the second liquid crystal unit.

3. The display panel according to claim 1, wherein The display panel further includes a spacer layer, the spacer layer is disposed between the array substrate and the counter substrate, the spacer layer includes a plurality of spacers, and the spacers are disposed between adjacent first liquid crystal units and second liquid crystal units; The photoinitiation inhibition layer is disposed on the outer surface of the spacer.

4. The display panel according to claim 1, wherein: The display panel further includes a spacer layer, the spacer layer is disposed between the array substrate and the counter substrate, the spacer layer includes a plurality of spacers, and the spacers are disposed between adjacent first liquid crystal units and second liquid crystal units; The photoinitiation inhibition layer is disposed between one end of the spacer close to the counter substrate and the counter substrate.

5. The display panel according to any one of claims 1 to 4, wherein: The display panel further includes an infrared filter layer, and the infrared filter layer is arranged on a side of the counter substrate away from the cholesteric liquid crystal layer.

6. The display panel according to claim 5, wherein: The material of the infrared filter layer includes aluminum zinc oxide.

7. The display panel according to any one of claims 1 to 4, wherein: The counter substrate includes a base substrate and a common electrode layer. The common electrode layer is disposed on a side of the base substrate close to the cholesteric liquid crystal layer. The material of the common electrode layer includes aluminum zinc oxide.

8. The display panel according to any one of claims 1 to 4, wherein: The first liquid crystal unit is configured to reflect one of red light, green light, and blue light when an electric field is applied thereto, and the second liquid crystal unit is configured to reflect the other of red light, green light, and blue light when an electric field is applied thereto.

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